'non-reversible' originates from the prefix 'non-' meaning 'not' and the word 'reversible', which comes from Latin 'reversibilis', where 're-' meant 'back' and 'vertere' meant 'to turn'.

'reversibilis' transformed into the Old French word 'reversible', and eventually became the modern English word 'reversible'. The prefix 'non-' was added to form 'non-reversible'.

Initially, 'reversible' meant 'able to be turned back', but with the prefix 'non-', it evolved to mean 'not able to be turned back'.